VPN Client Connection Troubleshooting

Below are some common issues and resolutions around connecting to your VPN.

I am having trouble even connecting

If you are having trouble connecting, it often has something to do with the firewall. Here is an example of a log that shows this error. To resolve this you can either change your firewall settings to allow the port or contact support to change the port that your VPN uses.

If you see the above error message in your OpenVPN log, it can mean a few things:

You may have reached the maximum concurrent sessions available for your OpenVPN connection. Go to https://control.ctl.io/Network/vpn and click "edit settings" to increase your max connections, then try again.

Your Windows firewall is blocking the required port. Try to disable your firewall and connect again. If you don't want to disable your firewall, you can open the required Inbound/Outbound ports. Your remote ports are unique. You can find the port numbers by following the instructions below or by contacting support.

Your physical firewall is blocking the required port. Check with your network administrator and let them know that you need a specific Outbound TCP and UDP port number to be opened in order for OpenVPN to be able to connect to CenturyLink Cloud. You can find the port number by following the instructions below or by contacting support.

To find your OpenVPN port, open the configuration folder for your VPN connection (C:\Program Files (x86)/OpenVPN/config/[VpnName] in Windows, or inside the TBLK file using Tunnelblick on a Mac). In this folder, find the ovpn file and open it with Notepad or a similar text editor. Under the proto tcp or proto udp line, there is a line remote [IPHOST] [PORT]. The last number on this line is the port number.